:root {
  --azul-oscuro: #193C54;
  --azul-profundo: #1F5066;
  --azul-medio: #3273BC;
  --azul-claro: #4E96AC;
  --gris-medio: #B1C1CF;
  --gris-azulado: #BEDBE2;
  --fondo-claro: #F2F9FA;
}

html, body {
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  font-family: "Segoe UI", Arial, sans-serif;
  background-color: var(--fondo-claro);
  background-image: url("fondo.png");
  color: var(--azul-oscuro);
  background-size: 100% auto;
  background-position: bottom center;
  background-repeat: no-repeat;
  min-height: 100vh;
  padding: 40px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.container {
  background-color: white;
  border-radius: 16px;
  box-shadow: 0 4px 10px rgba(25, 60, 84, 0.2);
  padding: 30px 40px;
  max-width: 400px;
  width: 100%;
}

h1, h2 {
  text-align: center;
  color: var(--azul-profundo);
}

form label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  font-weight: 500;
}

input[type="number"] {
  width: 90px;
  padding: 6px 8px;
  border: 1px solid var(--gris-medio);
  border-radius: 6px;
  background-color: var(--gris-azulado);
}

button, a {
  display: block;
  width: 60%;   
  max-width: 250px;   
  margin: 30px auto 0;  
  padding: 10px 0;
  background-color: var(--azul-medio);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  text-align: center;
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.1s ease;
}

button:hover, a:hover {
  background-color: var(--azul-claro);
  transform: scale(1.02);
}

.resultado pre {
  background: var(--gris-azulado);
  padding: 12px;
  border-radius: 8px;
  color: var(--azul-oscuro);
  font-size: 14px;
  white-space: pre-wrap; 
  word-wrap: break-word;
}

.titulo-cajas {
  text-align: right;
  font-weight: 600;
  margin-bottom: 8px;
  margin-right: 0px; 
  color: var(--azul-profundo);
}

.botones-acciones {
  display: flex;
  justify-content: space-between;
  margin-top: 25px;
}

.btn-agregar, .btn-calcular {
  width: 48%; 
  padding: 10px 0;
  background-color: var(--azul-medio);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.1s ease;
}

.btn-agregar:hover, .btn-calcular:hover {
  background-color: var(--azul-claro);
  transform: scale(1.02);
}